/*
* Copyright (C) 2008-2018 TrinityCore <https://www.trinitycore.org/>
* Copyright (C) 2005-2009 MaNGOS <http://getmangos.com/>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along
* with this program. If not, see <http://www.gnu.org/licenses/>.
*/

#ifndef _AUTH_HMAC_H
#define _AUTH_HMAC_H

#include "Define.h"
#include <string>
#include <openssl/hmac.h>
#include <openssl/sha.h>

class BigNumber;

#define SEED_KEY_SIZE 16

class TC_COMMON_API HmacHash
{
public:
    HmacHash(uint32 len, uint8* seed);
    ~HmacHash();
    void UpdateData(std::string const& str);
    void UpdateData(uint8 const* data, size_t len);
    void Finalize();
    uint8* ComputeHash(BigNumber* bn);
    uint8* GetDigest() { return m_digest; }
    int GetLength() const { return SHA_DIGEST_LENGTH; }
private:
    HMAC_CTX * m_ctx;
    uint8 m_digest[SHA_DIGEST_LENGTH];
};
#endif